A CCTV image has been released after a teenage girl was elbowed to the back of the head.
Officers want to speak to the woman pictured as they investigate the assault, which took place in Clumber Street, Nottingham.
The victim was walking along the street around 11.30 am on 28 May 2024 when the offender ran up behind her and struck her from behind.
Moments earlier, the victim had bumped into a woman accidentally.
Police Constable Michael Plant, of Nottinghamshire Police, said:
“The victim was simply walking along the road when she was attacked from behind.
“We want to trace the individual who is responsible and believe the woman pictured could have important information.
“If you recognise her, please get in touch.”
Anyone with any information should call police on 101, quoting incident number 201 of 28 May 2024, or Crimestoppers on 0800 555111.
• Boy, 16, killed by falling tree in Nottinghamshire – three arrested